By contrast, the earliest dinosaurs were much smaller than their descendants—more the size of a chicken or dog than a Diplodocus. They walked on two legs (were bipedal) and most are thought to ...

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By contrast, the earliest dinosaurs were much smaller than their descendants – more the size of a chicken or dog than a Diplodocus. They walked on two legs (were bipedal) and most are thought to have ...

This is particularly evident in sauropods, the group that includes massive plant-eaters like Brontosaurus and Diplodocus. These dinosaurs appear to have retained their preference for warm climates, ...